Question
1. What is the speed of a 70kg rock after it has fallen freely for 1000m?
2. How far would a 1kg ball have to fall freely to reach a speed of 100km/h?
2. How far would a 1kg ball have to fall freely to reach a speed of 100km/h?
Answers
bobpursley
1. vf^2=vi^2+2g*d
vi is zero, solve for vf
2. change km/hr to m/s
same formula. Mass is not needed.
vi is zero, solve for vf
2. change km/hr to m/s
same formula. Mass is not needed.